Android 数据操作（二）Xml解析之pull解析

这一篇blog，重要来看看xml文件的Pull解析。

首先，我们自定义个AttributeSet属性：

<resources> <declare-styleable name="my_xml_test"> <attr name="name" format="string"></attr> <attr name="age" format="integer"></attr> <attr name="sex" format="boolean"></attr> <attr name="school" format="string"></attr> </declare-styleable> </resources>

之后，定义一个xml文件：xml_parser_file.xml:

<?xml version="1.0" encoding="utf-8"?> <infos xmlns:xmltest="http://schemas.android.com/apk/res-auto"> <studentinfo xmltest:name="xiaoming" xmltest:age="12" xmltest:sex="true"> <schoolinfo xmltest:school="No.one"> </schoolinfo> <schoolinfo xmltest:school="No.two"> </schoolinfo> </studentinfo> <studentinfo xmltest:name="xiaohong" xmltest:age="15" xmltest:sex="false"> <schoolinfo xmltest:school="No.three"> </schoolinfo> <schoolinfo xmltest:school="No.four"> </schoolinfo> </studentinfo> </infos>  注意：三级节点的格式。

             一开始疏忽写成了：

<schoolinfo> xmltest:school="No.four" </schoolinfo>结果，老半天没有解析出来。

最后是java中解析：

XmlResourceParser parser = mContext.getResources().getXml(R.xml.xml_parser_file); AttributeSet attrs = Xml.asAttributeSet(parser); int type = -1; TypedArray parentArray = null; TypedArray childArray = null; while((type = parser.next()) != XmlPullParser.END_DOCUMENT) { switch (type) { case XmlPullParser.START_TAG: if(parser.getName().equals("studentinfo")) { parentArray = mContext.obtainStyledAttributes(attrs, R.styleable.my_xml_test); String name = parentArray.getString(R.styleable.my_xml_test_name); Log.e("vnbo","vnbo name is "+name); } else if(parser.getName().equals("schoolinfo")) { childArray = mContext.obtainStyledAttributes(attrs, R.styleable.my_xml_test); String school = childArray.getString(R.styleable.my_xml_test_school); Log.e("vnbo","vnbo school is "+school); childArray.recycle(); } break; case XmlPullParser.END_TAG: if(parser.getName().equals("studentinfo")) { parentArray.recycle(); } break; }  注意：parentArray的recyle方法的调用位置。注意其调用顺序和childArray的recycle的调用相对顺序。